Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1a25282395f026…

MALICIOUS

PDF

68.5 KB Created: 2020-08-17 11:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d255f7fbd6e44b4db734820711e8785 SHA-1: 0c98fe9859a54001f6865ab4249114ee88f81be1 SHA-256: 4b1a25282395f026298a5c0a4da39ee1a351de12a5005b831bb91bb24ab7dd3f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a car manual, which is a common lure for phishing or malware distribution. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the link leads to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates the document is part of a larger link farm, likely for SEO poisoning or distributing malicious content. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=manual+usuario+audi+q5+2014+pdf
    • http://wukune.schoolcafeclub.org/uploads/1/3/0/7/130740069/1f4c5e339.pdf
    • http://pivawe.bigbucksobx.com/uploads/1/3/1/6/131637223/00b33748515.pdf
    • http://vupebog.boonvillenychurch.org/uploads/1/3/1/0/131070161/4d0a595.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/e2_80_9ctemtem_e2_80_9d.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/safevomezuropasomubukire.pdf
    • https://cdn.shopify.com/s/files/1/0431/2429/3796/files/wijavukabopirige.pdf
    • https://cdn.shopify.com/s/files/1/0431/4644/4960/files/push_project_to_github.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5383/files/44884760061.pdf
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/reportage_sur_le_loup_en_france.pdf
    • https://cdn.shopify.com/s/files/1/0452/1459/7271/files/adaptive_behavior_inventory.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/65605057235.pdf
    • https://cdn.shopify.com/s/files/1/0443/2855/0556/files/filehippo_to_word_converter.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000abad.bin
6a223183745e3bd1907835381b0e67c8797bbfcc5759323483a44209e9ea45bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABAD 5704 bytes
font_01_sfnt_off0000bf2e.bin
a94678b1b3775d5bce717f61dd0b76810ff62db98a4f1525943340c7c23d2a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2E 15812 bytes
font_02_sfnt_off0000f069.bin
c43c81af3addadc619f1b50b0eb79006c69e58cb90abf43f7a5fbd940e22698c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF069 16060 bytes

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